More unused stuff removal (#49)

* More unused stuff removal

delete:
- giant 'metaheaders' (JA2 All.h, Laptop All.h, etc), preferring to add #includes directly where needed
- unused ExceptionHandling and DbMan translation units
- unused WizShare.h, Bitmap.h, trle.h, video_private.h headers

* remove mentions from vc proj files too

* remove preprocessor conditionals for unused definitions

find . -iname '*.h' -o -iname '*.cpp' -exec unifdef.exe -m -UPRECOMPILED_HEADERS -UJA2_PRECOMPILED_HEADERS -UWIZ8_PRECOMPILED_HEADERS -UPRECOMPILEDHEADERS {} ';'

then manually fixed a couple files the tool errored out on

* yes, the comments too

as title

Standard Gaming Platform/Button System.cpp

@@ -4,11 +4,6 @@
 	Rewritten mostly by Kris Morness
 ***********************************************************************************************/
 
-#ifdef JA2_PRECOMPILED_HEADERS
-	#include "JA2 SGP ALL.H"
-#elif defined( WIZ8_PRECOMPILED_HEADERS )
-	#include "WIZ8 SGP ALL.H"
-#else
 	#include "types.h"
 	#include <windows.h>
 	#include <stdio.h>
@@ -35,7 +30,6 @@
 	#else
 		#include "video2.h"
 	#endif
-#endif
 #include <vector>